divide the frozen yogurt into 1/4 cup sections, and place the first in the bottom of the cup. then place about a spoon or so of mixed berries onto the yogurt. do this again three more times, 'til you're out of yogurt.

pour the soda into the cup and let it seep into the cracks of your float, place a cherry on top and enjoy. it's amazing. you'll want a spoon. but it's low in fat so you can have it again. and again! and AGAIN!